a.gif
Shader "Custom/RotateUVShader"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
_RotateSpeed ("旋轉(zhuǎn)速度", Float) = 1.0
}
SubShader
{
Tags
{
"RenderType"="Opaque"
}
LOD 100
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
// make fog work
#pragma multi_compile_fog
#include "UnityCG.cginc"
struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
};
struct v2f
{
float2 uv : TEXCOORD0;
UNITY_FOG_COORDS(1)
float4 vertex : SV_POSITION;
};
sampler2D _MainTex;
float4 _MainTex_ST;
half _RotateSpeed;
v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.uv, _MainTex);
UNITY_TRANSFER_FOG(o,o.vertex);
return o;
}
half getMold(fixed3 v)
{
return pow( (pow(v.x,2)+pow(v.y,2)+pow(v.z,2)),0.5);
}
fixed4 frag (v2f i) : SV_Target
{
// sample the texture
float2 uv = i.uv.xy - float2(0.5, 0.5);//移動(dòng)坐標(biāo)系原點(diǎn)
uv = float2(uv.x *cos(_RotateSpeed *_Time.x) - uv.y * sin(_RotateSpeed *_Time.x),uv.x *sin(_RotateSpeed * _Time.x) + uv.y*cos(_RotateSpeed *_Time.x));//自行推導(dǎo)
uv += float2(0.5, 0.5);
uv.x = clamp(uv.x, 0, 1);
uv.y = clamp(uv.y, 0, 1);
float4 col = tex2D(_MainTex, uv);
// apply fog
UNITY_APPLY_FOG(i.fogCoord, col);
return col;
}
ENDCG
}
}
}
